Chimney-cap.



J. W. MEIXELL.

CHIMNEY CAP.

APPLICATION FILED JAN.22, 1914.

Patented Aug. 3; 1915.

COLUIUIA PLANOORAPH CO" WASHINGTOIh D. C.

JOHN w. MEIXELL, or LEWISBURG, PENNSYLVANIA.

CHIMNEY-CAP.

Specification of Letters Patent.

Patented Aug. 3, 1915.

Application filed January 22, 1914. Serial No. 813,764.

The primary object of my invention is to provide a rotatable cap which will-readily turn upon its axis to dispose the hooded outs let-opening away from the wind or air currents and thereby induce a strong updraft in the chimney or ventilating stack, according to the use to which it is applied, the arrangement of the hood surrounding the outletopening in the present instance being very effective to produce the required updraft and prevent down drafts in the chimney or stack no matter how variable the wind or air-currents may be.

A further object of my present invention is to mount the hooded cap in such manner that it will freely turn under the influence of the wind, and the bearings readily freedfrom soot or other matter liable to collect thereon.

Other objects of the invention will hereinafter appear, and what I claim as my invention, and desire to protect by Letters-Patent is hereinafter set forth in the appended claims.

In the accompanying drawings, which form a part of this specification: Figure 1 is a side elevation of a chimney-cap, constructed in accordance with my invention. Fig. 2 is a front elevation. Fig. 3 is a plan view. Fig. 4 is a Vertical sectional view, on the line 44 of Fig. 3. Fig. 5 is a detail perspective view of the supporting bearing bracket for the chimney-cap.

In carrying out my invention the body portion 6 of the cap is made conical and provided at one side with an outlet opening 7, substantially triangular in shape, the wide lower end of the opening being a slight distance above the lower edge of the cap and parallel thereto, and the contracted upper end thereof located a slight distance below the apex of said cap. This part of the cap is made of sheet metal, as is usual in devices of this character, and for convenience in cutting the metal to form the outlet opening the joint, as 8, is disposed on a line with the center of said opening.

Projecting from the body portion of the cap, at the sides and upper end of the outlet opening, is a hood consisting of side wings 9, 9, and a top 10, formed of one piece of sheet metal, the side wings following the sides of the aforesaid opening converge upwardly, and preferably extend below the opening; while the top of said hood is narrower at its inner end andgradually increases in width outwardly, as shown. The top of; the hood is depressed, flaring upwardly at either side of a center line or crease 10,, and the upper portion of each side wing 9 isflared outwardly, at 9, to its juncture with the top from a line or crease 9 By reference to the drawings it will be noted that the outer edges of the top and the crease lines 9 10 radiate from a common point X, located in the rear of the cap and on a horizontal plane extending midway between the aforesaid edges and crease-lines. By forming the hood in this particular manner its efliciency is greatly increased, for when the cap is rotatably mounted on the chimney it will maintain its position with the outlet opening away from the wind when subjected to variable air-currents; inasmuch as a current of air tending in an upwardly direction and glancing off either side wing will strike the flared portion 19 thereof and turn said cap so that the outlet opening will be in the direction of such air-current, and air-currents tending downwardly from either side will strike an upwardly inclined portion of the top and turn the cap in the direction of the air-current. Variable air-eurrents of this kind occur where the chimney is located near to or between higher buildings, and it will be readily seen that by reason of the particular construction of the side Wings and top of the hood the cap will turn easily even under the influence of light aircurrents. Of course the cap will turn in a similar manner under the influence of horizontal air-currents, owing to the fact that the wings and top of the hood radiate from the cap. The cap will therefore respond quickly and maintain the outlet opening at all times away from the wind to protect the chimney from the weather and from downdrafts, as well as induce a maximum updraft.

For the purpose of rotatably mounting the cap on the upper end of a chimney,

smokdpipe, or ventilating stack, there is attached to the rear wall of the cap, at the inner side thereof, a supporting and bearing bracket 11, having horizontal members 11*, 11", through which passes a supportingspindle 12, and an upper horizontal member 11, resting upon the pointed upper end of said spindle; whereby the members 11 11 prevent the cap from tilting and the member 11 in connection with the pointed upper end of the spindle forms an anti-friction bearing for the easy rotation of the cap. The spindle 12 is supported in the usual manner from across-bar 13 carried by a ring 14, the latter being adapted to fit upon the upper end of the chimney, smoke-pipe or ventilating-stack.

In the present instance the supporting and bearing bracket for the cap is of a peculiar shape and made in a single casting to provide an attaching-plate 11 disposed at an angle corresponding with that of the wall of the cap so that the aforesaid members 11 11 and 11 will be horizontal, and for the purpose of stability the lower members 11 and 11 are connected by a bracing member 11". stance, also, the under surface of the upper member 11, which seats upon the pointed upper end of the spindle, is plain, instead of being provided with the usual depression, so that it will not accumulate soot or other foreign matter. For convenience in attaching this supporting and bearing bracket to the cap the upper part of the attachingplate 11 thereof is provided with a hole through which an attaching screw, rivet or bolt, as 15, passes, and thelower portion of said plate provided with lateral wings 11 11 simply recessed at their edges to re ceive the attaching screws, rivets or bolts 16.

Having described my invention, I claim:

Copies of this patent may be obtained for five cents each, by addressing the Washington, D. G.

In the present in- 1. A chimney cap conical in shape and provided with an outlet opening, in combination with a hood surrounding the sides and upper end'of the opening and projecting outwardly therefrom, the top of said hood being depressed to provide oppositely inclined surfaces and the sides of the hood flared at their upper ends, substantially as shown and for the purpose set forth.

2. A chimney 'cap conical in shape and having an outlet opening wide at its lower end and narrow at its upper end,'in combination with a hood comprising side wings and a top, the side wings converging towardeach other from their lower ends and flared vertically at their upper ends, and the top connecting the upper ends of the wings being depressed centrally to provide oppositely inclined surfaces, substantially as shown and for the purpose set forth.

3. A chimney cap conical in shape and having an outlet opening wide at its lower end and narrow at its upper end, in combination with a hood projecting from the cap at the sides and top of the outlet-openname to this specification in the presence of two subscribing witnesses.

JOHN W. MEIXELL. In the presence of C As. E. RIoRDoN, W. S. DUVALL.

Commissioner of Patents, 

